So far we've had 'multimodalities', 'multisemiotics' and 'multiliteracies'.
Another multi I've come across is 'multi-platform'. It often pops up in discussions of "360-degree commissioning" (see http://www.broadcastnow.co.uk/news/focus_360degree_commissioning.html).
360-degree commissioning is all about creating content accessible from other platforms - 'multi-platforms' - such as including mobile phones and the internet.
The BBC series Torchwood has been cited as an example of 360 degree programming. However, Doctor Who looks a better example with a web site that includes MP3s to download, video clips, an RSS news feed, make your own video trailer or comic options and a range of online games.